Be a handsome man: Handsome men are more likely to be called in for...

Have a plan: Researchers at the University of Missouri found people who developed and followed a plan during an interview had a better outcome than those who didn’t. The study also found being positive during the process was a key factor.

Wear glasses: According to research by the College of Optometrists,...

Don’t have wine at dinner: University of Michigan and University of Pennsylvania found applicants who ordered wine during dinner interviews were seen as less bright or not as hireable as those who did not drink alcohol.

Don’t be pregnant: A 2007 Midwestern University study found pregnant women were less likely to get recommended for jobs than those who were not pregnant. The pregnant applicant was also perceived to need more time off, miss work or quit.

Don’t be overweight: A study in the Journal of Applied Psychology found overweight women were less likely to be hired or be helped. People who were closer to their ideal body mass index were more likely to be helped or hired.

Don’t be skinny: Your body weight might not impact whether you can do a job, but it can determine whether you get one. A study found people who appear emaciated or are too skinny are often discriminated against in the interview process.

Don’t be old – or maybe not: Studies tell a different story about age. A survey by Adecco found employers are three times more likely to hire a mature worker, or someone older than 50, than millennials. But an AARP survey found people over the age of 50 often face age discrimination at work.